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package com.taobao.android.builder.tools.manifest;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.android.xml.AndroidXPathFactory;
import com.google.common.collect.HashBasedTable;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.collect.Table;
import com.taobao.android.builder.extension.ManifestOptions;
import com.taobao.android.builder.tools.bundleinfo.model.BundleInfo;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.dom4j.Attribute;
import org.dom4j.Comment;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.Visitor;
import org.dom4j.VisitorSupport;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpressionException;

/**
 * Manifest文件的工具类 Created by shenghua.nish on 2015-04-22 上午10:58.
 */
public class ManifestFileUtils {

    private static Logger logger = LoggerFactory.getLogger(ManifestFileUtils.class);

    public static String[] SYSTEM_PERMISSION = new String[]{"android.permission", "com.android"};

    /**
     * 对manifest做后续处理
     *
     * @param mainManifest
     * @param libManifestMap
     * @param baseBunfleInfoFile
     * @param manifestOptions
     */
    public static void postProcessManifests(File mainManifest,
                                            Map<String, File> libManifestMap,
                                            Multimap<String, File> libDependenciesMaps,
                                            File baseBunfleInfoFile,
                                            ManifestOptions manifestOptions,
                                            boolean addMultiDex,
                                            Set<String> remoteBundles) throws IOException, DocumentException {
        File backupFile = new File(mainManifest.getParentFile(), "AndroidManifest-backup.xml");
        FileUtils.deleteQuietly(backupFile);
        FileUtils.moveFile(mainManifest, backupFile);

        XMLWriter writer = null;// 声明写XML的对象
        SAXReader reader = new SAXReader();
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");// 设置XML文件的编码格式
        FileOutputStream fos = new FileOutputStream(mainManifest);
        if (mainManifest.exists()) {
            try {
                Document document = reader.read(backupFile);// 读取XML文件
                if (null != baseBunfleInfoFile && baseBunfleInfoFile.exists()) {
                    addApplicationMetaData(document,
                                           libManifestMap,
                                           baseBunfleInfoFile,
                                           manifestOptions,
                                           remoteBundles);
                }
                if (null != manifestOptions && manifestOptions.isAddBundleLocation()) {
                    addBundleLocationToDestManifest(document,
                                                    libManifestMap,
                                                    libDependenciesMaps,
                                                    manifestOptions);
                }
                if (null != manifestOptions && manifestOptions.isReplaceApplication()) {
                    replaceManifestApplicationName(document);
                }
                if ((null != manifestOptions && manifestOptions.isAddMultiDexMetaData()) ||
                        addMultiDex) {
                    addMultiDexMetaData(document);
                }
                if (null != manifestOptions && manifestOptions.isRemoveProvider()) {
                    removeProvider(document);
                }
                removeCustomLaunches(document, manifestOptions);
                updatePermission(document, manifestOptions);
                removeComments(document);

                writer = new XMLWriter(fos, format);
                writer.write(document);
            } finally {
                if (null != writer) {
                    writer.close();
                }
                IOUtils.closeQuietly(fos);
            }
        }
    }

    private static File getOrgManifestFile(File libManifestFile) {
        File orgManifestFile = new File(libManifestFile.getParentFile(),
                                        FilenameUtils.getBaseName(libManifestFile.getName()) +
                                                "-org.xml");
        if (orgManifestFile.exists()) {
            return orgManifestFile;
        }
        return libManifestFile;
    }

    /**
     * 替换manifest中的原有application name为AtlasBridgeApplication
     * 原有name已meta-data的方式写入
     */
    private static void replaceManifestApplicationName(Document document) {
        // 写入meta-data信息
        Element root = document.getRootElement();// 得到根节点
        Element applicationElement = root.element("application");
        String realApplicationClassName = applicationElement.attributeValue("name");
        applicationElement.addAttribute("name",
                                        "android.taobao.atlas.startup.AtlasBridgeApplication");

        Element metaData = applicationElement.addElement("meta-data");
        metaData.addAttribute("android:name", "REAL_APPLICATION");
        metaData.addAttribute("android:value", realApplicationClassName);
    }

    private static void addMultiDexMetaData(Document document) {
        // 写入meta-data信息
        Element root = document.getRootElement();// 得到根节点
        Element applicationElement = root.element("application");

        Element metaData = applicationElement.addElement("meta-data");
        metaData.addAttribute("android:name", "multidex_enable");
        metaData.addAttribute("android:value", "true");
    }

    /**
     * 往主的manifest中添加metadata信息，作为atals的兜底方案
     *
     * @param document
     * @param libManifestMap
     * @param baseBunfleInfoFile
     * @param manifestOptions
     */
    private static void addApplicationMetaData(Document document,
                                               Map<String, File> libManifestMap,
                                               File baseBunfleInfoFile,
                                               ManifestOptions manifestOptions,
                                               Set<String> remoteBundles) throws IOException, DocumentException {
        Map<String, BundleInfo> bundleFileMap = Maps.newHashMap();
        // 解析基础信息
        if (null != baseBunfleInfoFile &&
                baseBunfleInfoFile.exists() &&
                baseBunfleInfoFile.canRead()) {
            String bundleBaseInfo = FileUtils.readFileToString(baseBunfleInfoFile, "utf-8");
            bundleFileMap = JSON.parseObject(bundleBaseInfo,
                                             new TypeReference<Map<String, BundleInfo>>() {
                                             });
        }
        Map<String, LibBundleInfo> awbManifestMap = Maps.newHashMap();
        for (Map.Entry<String, File> entry : libManifestMap.entrySet()) {
            String artifactId = entry.getKey();

            String libName = artifactId.substring(artifactId.indexOf("-") + 1);

            File libManifest = entry.getValue();
            libManifest = getOrgManifestFile(libManifest);
            if (libManifest.exists()) {
                SAXReader reader = new SAXReader();
                Document libDocument = reader.read(libManifest);// 读取XML文件
                Element libRoot = libDocument.getRootElement();// 得到根节点
                String packageName = libRoot.attributeValue("package");
                Element applicationElement = libRoot.element("application");
                String applicationName = null;
                if (null != applicationElement) {
                    applicationName = applicationElement.attributeValue("name");
                }
                LibBundleInfo libBundleInfo = new LibBundleInfo(artifactId,
                                                                packageName,
                                                                applicationName,
                                                                bundleFileMap.get(libName),
                                                                libName);
                awbManifestMap.put(artifactId, libBundleInfo);
            }
        }

        // 写入meta-data信息
        Element root = document.getRootElement();// 得到根节点
        List<? extends Node> nodes = root.selectNodes("//application");
        for (Node node : nodes) {
            Element element = (Element) node;
            for (String artifactId : libManifestMap.keySet()) {
                LibBundleInfo libBundleInfo = awbManifestMap.get(artifactId);
                if (StringUtils.isNotBlank(libBundleInfo.applicationName)) {
                    String bundlePackageName = libBundleInfo.packageName;
                    BundleInfo bundleInfo = libBundleInfo.bundleInfo;
                    Element metaData = element.addElement("meta-data");

                    String bundleDepValue = "";
                    if (null != bundleInfo && bundleInfo.getDependency() != null) {
                        bundleDepValue = StringUtils.join(bundleInfo.getDependency(), "|");
                    }
                    String value = libBundleInfo.applicationName +
                            "," +
                            !remoteBundles.contains(libBundleInfo.libName) +
                            "," +
                            bundleDepValue;
                    logger.info("[bundleInfo] add bundle value : " + value + " to manifest");
                    metaData.addAttribute("android:name", "bundle_" + bundlePackageName);
                    metaData.addAttribute("android:value", value);
                }
            }
        }
    }

    static class LibBundleInfo {

        String name;

        String packageName;

        String applicationName;

        BundleInfo bundleInfo;

        String libName;

        public LibBundleInfo(String name,
                             String packageName,
                             String applicationName,
                             BundleInfo bundleInfo,
                             String libName) {
            this.name = name;
            this.packageName = packageName;
            this.applicationName = applicationName;
            this.bundleInfo = bundleInfo;
            this.libName = libName;
        }
    }

    /**
     * 在manifest文件中增加bundleLocation
     *
     * @param document
     * @param libManifestMap
     * @param manifestOptions
     * @throws DocumentException
     */
    private static void addBundleLocationToDestManifest(Document document,
                                                        Map<String, File> libManifestMap,
                                                        Multimap<String, File> libDependenciesMaps,
                                                        ManifestOptions manifestOptions) throws DocumentException {
        Table<String, String, String> bundleInfoTable = HashBasedTable.create();
        Map<String, String> packageNameMap = new HashMap<String, String>();
        for (Map.Entry<String, File> entry : libManifestMap.entrySet()) {
            File libManifest = entry.getValue();
            if (libManifest.exists()) {
                SAXReader reader = new SAXReader();
                Document libDocument = reader.read(libManifest);// 读取XML文件
                Element libRoot = libDocument.getRootElement();// 得到根节点
                String packageName = libRoot.attributeValue("package");
                packageNameMap.put(entry.getKey(), packageName);
                List<? extends Node> nodes = libRoot.selectNodes("//activity|//service|//receiver");
                for (Node node : nodes) {
                    Element e = (Element) node;
                    String name = e.attributeValue("name");
                    String type = e.getName();
                    bundleInfoTable.put(type, name, packageName);
                }
            }
        }

        // 获取所有依赖的manifest信息
        for (String key : libDependenciesMaps.keySet()) {
            Collection<File> libManifests = libDependenciesMaps.get(key);
            for (File libManifest : libManifests) {
                if (libManifest.exists()) {
                    SAXReader reader = new SAXReader();
                    Document libDocument = reader.read(libManifest);// 读取XML文件
                    Element libRoot = libDocument.getRootElement();// 得到根节点
                    String packageName = packageNameMap.get(key);
                    List<? extends Node> nodes = libRoot.selectNodes(
                            "//activity|//service|//receiver");
                    for (Node node : nodes) {
                        Element e = (Element) node;
                        String name = e.attributeValue("name");
                        String type = e.getName();
                        bundleInfoTable.put(type, name, packageName);
                    }
                }
            }
        }

        Element root = document.getRootElement();// 得到根节点
        List<? extends Node> nodes = root.selectNodes("//activity|//service|//receiver");
        for (Node node : nodes) {
            Element e = (Element) node;
            String name = e.attributeValue("name");
            String type = e.getName();
            String packageName = bundleInfoTable.get(type, name);
            if (null != packageName) {
                Element metaData = e.addElement("meta-data");
                metaData.addAttribute("android:name", "bundleLocation");
                metaData.addAttribute("android:value", packageName);
            }
        }
    }

    /**
     * 删除自定义的launches
     *
     * @param document
     * @param manifestOptions
     */
    private static void removeCustomLaunches(Document document, ManifestOptions manifestOptions) {
        if (null == manifestOptions)
            return;
        Element root = document.getRootElement();// 得到根节点
        // 更新launch信息
        if (manifestOptions.getRetainLaunches() != null &&
                manifestOptions.getRetainLaunches().size() > 0) {
            List<? extends Node> nodes = root.selectNodes(
                    "//activity/intent-filter/category|//activity-alias/intent-filter/category");
            for (Node node : nodes) {
                Element e = (Element) node;
                if ("android.intent.category.LAUNCHER".equalsIgnoreCase(e.attributeValue("name"))) {
                    Element activityElement = e.getParent().getParent();
                    String activiyName = activityElement.attributeValue("name");
                    if (!manifestOptions.getRetainLaunches().contains(activiyName)) {
                        if (activityElement.getName().equalsIgnoreCase("activity-alias")) {
                            activityElement.getParent().remove(activityElement);
                        } else {
                            e.getParent().remove(e);
                        }
                    }
                }
            }
        }
    }

    /**
     * 设置manifest的权限
     *
     * @param document
     * @param manifestOptions
     */
    private static void updatePermission(Document document, ManifestOptions manifestOptions) {
        if (null == manifestOptions)
            return;
        Element root = document.getRootElement();// 得到根节点
        // 更新自定义权限
        if (manifestOptions.isRemoveCustomPermission()) {
            List<? extends Node> nodes = root.selectNodes("//permission");
            for (Node node : nodes) {
                Element element = (Element) node;
                String name = element.attributeValue("name");
                boolean retain = false;
                for (String systemPermission : SYSTEM_PERMISSION) {
                    if (name.startsWith(systemPermission)) {
                        retain = true;
                        break;
                    }
                }
                // 如果存在着自定义权限
                if (null != manifestOptions.getRetainPermissions() &&
                        manifestOptions.getRetainPermissions().size() > 0) {
                    for (String retainPermission : manifestOptions.getRetainPermissions()) {
                        if (name.startsWith(retainPermission)) {
                            retain = true;
                            break;
                        }
                    }
                }
                if (!retain) {
                    element.getParent().remove(element);
                }
            }
        }

        // 更新系统权限
        if (null != manifestOptions.getRemoveSystemPermissions() &&
                manifestOptions.getRemoveSystemPermissions().size() > 0) {
            List<? extends Node> nodes = root.selectNodes("//uses-permission");
            for (Node node : nodes) {
                Element element = (Element) node;
                String name = element.attributeValue("name");
                Set<String> removedPermissions = manifestOptions.getRemoveSystemPermissions();
                if (removedPermissions.contains(name)) {
                    element.getParent().remove(element);
                }
            }
        }
    }

    /**
     * 移除xml中的注释
     *
     * @param document
     * @throws IOException
     * @throws DocumentException
     */
    private static void removeComments(Document document) throws IOException, DocumentException {
        Visitor visitor = new VisitorSupport() {

            public void visit(Comment comment) {
                comment.setText(" ");
            }
        };
        document.accept(visitor);
    }

    /**
     * 获取制定manifest文件的packageId
     *
     * @param manifestFile
     * @return
     */
    public static String getApplicationId(File manifestFile) {
        SAXReader reader = new SAXReader();
        if (manifestFile.exists()) {
            Document document = null;// 读取XML文件
            try {
                document = reader.read(manifestFile);
                Element root = document.getRootElement();// 得到根节点
                String packageName = root.attributeValue("package");
                return packageName;
            } catch (DocumentException e) {
            }
        }
        return null;
    }

    /**
     * 预处理指定的manifest文件
     *
     * @param mainManifestFile
     * @param libManifestFiles
     * @param updateSdkVersion
     */
    @Deprecated
    public static void preProcessManifests(File mainManifestFile,
                                           List<File> libManifestFiles,
                                           boolean updateSdkVersion) throws DocumentException, IOException {
        ManifestFileObject mainManifestFileObject = getManifestFileObject(mainManifestFile);
        for (File libManifestFile : libManifestFiles) {
            // 写文件
            updatePreProcessManifestFile(libManifestFile, mainManifestFileObject, updateSdkVersion);
        }

        //获取bundleInfo信息

    }

    /**
     * 更新libManifest文件
     *
     * @param libManifestFile
     * @param mainManifestFileObject param updateSdkVersion
     */
    public static void updatePreProcessManifestFile(File libManifestFile,
                                                    ManifestFileObject mainManifestFileObject,
                                                    boolean updateSdkVersion) throws IOException, DocumentException {

        if (!libManifestFile.exists()) {
            return;
        }

        File orgManifestFile = new File(libManifestFile.getParentFile(), "AndroidManifest-org.xml");
        if (orgManifestFile.exists()) {
            return;
        }

        libManifestFile.renameTo(orgManifestFile);

        SAXReader reader = new SAXReader();
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");// 设置XML文件的编码格式

        Document document = reader.read(orgManifestFile);// 读取XML文件
        Element root = document.getRootElement();// 得到根节点
        if (updateSdkVersion) {
            Element useSdkElement = root.element("uses-sdk");

            if (null == useSdkElement) {
                useSdkElement = root.addElement("uses-sdk");
            }

            if (null != useSdkElement) {
                updateElement(useSdkElement, mainManifestFileObject.getUseSdkProperties());
            }
        }

        // 先人工处理一下tools:remove和tools:replace规则，发现有些通过ManifestMerge不一定可以
        Element applicationElement = root.element("application");
        Map<String, String> replaceAttrs = mainManifestFileObject.getReplaceApplicationAttribute();
        List<String> removeAttrs = mainManifestFileObject.getRemoveApplicationAttribute();

        if (null != applicationElement) {
            // 去除lib项目里的tools属性
            List<Attribute> toRomoved = new ArrayList<Attribute>();
            for (Attribute attribute : applicationElement.attributes()) {
                if (attribute.getName().equals("replace") || attribute.getName().equals("remove")) {
                    // applicationElement.remove(attribute);
                    // applicationElement.attributes().remove(attribute);
                    toRomoved.add(attribute);
                }
            }
            if (toRomoved.size() > 0) {
                for (Attribute attribute : toRomoved) {
                    applicationElement.remove(attribute);
                }
            }

            updateApplicationElement(applicationElement, replaceAttrs, removeAttrs);
        }

        //处理packageName TODO
        String packageName = root.attributeValue("package");
        if (StringUtils.isEmpty(packageName)){
            packageName = ManifestFileUtils.getPackage(orgManifestFile);
        }

        List<? extends Node> applicatNodes = root.selectNodes("//application");
        for (Node node : applicatNodes) {
            Element element = (Element) node;
            Attribute attribute = element.attribute("name");
            if (attribute != null) {
                if (!attribute.getValue().startsWith(packageName)) {
                    attribute.setValue(packageName + attribute.getValue());
                }
            }
        }


        fillFullClazzName(root, packageName, "activity");
        fillFullClazzName(root, packageName, "provider");
        fillFullClazzName(root, packageName, "receiver");
        fillFullClazzName(root, packageName, "service");

        saveFile(document, format, libManifestFile);
    }

    private static void fillFullClazzName(Element root, String packageName, String type) {
        List<? extends Node> applicatNodes = root.selectNodes("//" + type);
        for (Node node : applicatNodes) {
            Element element = (Element) node;
            Attribute attribute = element.attribute("name");
            if (attribute != null) {
                if (attribute.getValue().startsWith(".")) {
                    attribute.setValue(packageName + attribute.getValue());
                }
            }
        }
    }

    private static void saveFile(Document document,
                                 OutputFormat format,
                                 File file) throws IOException {

        XMLWriter writer = null;// 声明写XML的对象
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(file);
            writer = new XMLWriter(fos, format);
            writer.write(document);
        } finally {
            if (null != writer) {
                writer.close();
            }
            IOUtils.closeQuietly(fos);
        }
    }

    /**
     * 更新Application节点信息
     *
     * @param element
     * @param replaceAttrs
     * @param removeAttrs
     */
    private static void updateApplicationElement(Element element,
                                                 Map<String, String> replaceAttrs,
                                                 List<String> removeAttrs) {
        for (Map.Entry<String, String> entry : replaceAttrs.entrySet()) {
            String key = entry.getKey();
            key = StringUtils.substringAfter(key, ":");
            Attribute attribute = element.attribute(key);
            if (null != attribute) {
                element.remove(attribute);
            }
        }
        for (String key : removeAttrs) {
            key = StringUtils.substringAfter(key, ":");
            Attribute attribute = element.attribute(key);
            if (null != attribute) {
                element.remove(attribute);
            }
        }
    }

    /**
     * 更新element的属性
     *
     * @param element
     * @param properties
     */
    private static void updateElement(Element element, Map<String, String> properties) {
        for (Map.Entry<String, String> entry : properties.entrySet()) {
            String key = entry.getKey();
            if (key.startsWith("tools:")) {
                continue;
            }
            String keyNoPrefix = key;
            String[] values = StringUtils.split(key, ":");
            if (values.length > 1) {
                keyNoPrefix = values[1];
            }
            if (null == entry.getValue()) {
                continue;
            } else {
                Attribute attribute = element.attribute(keyNoPrefix);
                if (null != attribute) {
                    attribute.setValue(entry.getValue());
                } else {
                    element.addAttribute(key, entry.getValue());
                }
            }
        }
    }

    /**
     * 获取mainifest文件的内容
     *
     * @param manifestFile
     * @return
     */
    public static ManifestFileObject getManifestFileObject(File manifestFile) throws DocumentException {
        SAXReader reader = new SAXReader();
        ManifestFileObject manifestFileObject = new ManifestFileObject();
        manifestFileObject.setManifestFile(manifestFile);
        if (manifestFile.exists()) {
            Document document = reader.read(manifestFile);// 读取XML文件
            Element root = document.getRootElement();// 得到根节点
            for (Attribute attribute : root.attributes()) {
                if (StringUtils.isNotBlank(attribute.getNamespacePrefix())) {
                    manifestFileObject.addManifestProperty(attribute.getNamespacePrefix() +
                                                                   ":" +
                                                                   attribute.getName(),
                                                           attribute.getValue());
                } else {
                    manifestFileObject.addManifestProperty(attribute.getName(),
                                                           attribute.getValue());
                }
            }
            Element useSdkElement = root.element("uses-sdk");
            Element applicationElement = root.element("application");
            if (null != useSdkElement) {
                for (Attribute attribute : useSdkElement.attributes()) {
                    if (StringUtils.isNotBlank(attribute.getNamespacePrefix())) {
                        manifestFileObject.addUseSdkProperty(attribute.getNamespacePrefix() +
                                                                     ":" +
                                                                     attribute.getName(),
                                                             attribute.getValue());
                    } else {
                        manifestFileObject.addUseSdkProperty(attribute.getName(),
                                                             attribute.getValue());
                    }
                }
            }
            if (null != applicationElement) {
                for (Attribute attribute : applicationElement.attributes()) {
                    if (StringUtils.isNotBlank(attribute.getNamespacePrefix())) {
                        manifestFileObject.addApplicationProperty(attribute.getNamespacePrefix() +
                                                                          ":" +
                                                                          attribute.getName(),
                                                                  attribute.getValue());
                    } else {
                        manifestFileObject.addApplicationProperty(attribute.getName(),
                                                                  attribute.getValue());
                    }
                }
            }
        }
        return manifestFileObject;
    }

    static Map<String, String> manifestMap = new HashMap<String, String>();

    public static String getPackage(File manifestFile) {

        String version = manifestMap.get(manifestFile.getAbsolutePath());
        if (null != version) {
            return version;
        }

        XPath xpath = AndroidXPathFactory.newXPath();

        try {
            version = xpath.evaluate("/manifest/@package",
                                     new InputSource(new FileInputStream(manifestFile)));
            manifestMap.put(manifestFile.getAbsolutePath(), version);
            return version;
        } catch (XPathExpressionException e) {
            // won't happen.
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }

        return null;
    }

    public static String getApplicationName(File manifestFile) {
        XPath xpath = AndroidXPathFactory.newXPath();
        try {
            return xpath.evaluate("/manifest/application/@android:name",
                                  new InputSource(new FileInputStream(manifestFile)));
        } catch (XPathExpressionException e) {
            // won't happen.
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }

        return null;
    }

    /**
     * 更新插件的minSdkVersion和targetSdkVersion
     *
     * @param androidManifestFile
     * @throws IOException
     * @throws DocumentException
     */
    public static String getVersionName(File androidManifestFile) throws IOException, DocumentException {
        SAXReader reader = new SAXReader();
        String versionName = "";
        if (androidManifestFile.exists()) {
            Document document = reader.read(androidManifestFile);// 读取XML文件
            Element root = document.getRootElement();// 得到根节点
            if ("manifest".equalsIgnoreCase(root.getName())) {
                List<Attribute> attributes = root.attributes();
                for (Attribute attr : attributes) {
                    if (StringUtils.equalsIgnoreCase(attr.getName(), "versionName")) {
                        versionName = attr.getValue();
                    }
                }
            }
        }
        return versionName;
    }

    public static void minifyManifest(File mainManifest,
                                      File destManifest) throws IOException, DocumentException {

        XMLWriter writer = null;// 声明写XML的对象
        SAXReader reader = new SAXReader();
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");// 设置XML文件的编码格式
        FileOutputStream fos = new FileOutputStream(destManifest);
        if (mainManifest.exists()) {
            try {
                Document document = reader.read(mainManifest);// 读取XML文件

                //                removeComments(document);

                Element element = document.getRootElement();

                element.clearContent();

                writer = new XMLWriter(fos, format);
                writer.write(document);
            } finally {
                if (null != writer) {
                    writer.close();
                }
                IOUtils.closeQuietly(fos);
            }
        }
    }

    public static void removeProvider(File androidManifestFile) throws IOException, DocumentException {
        File backupFile = new File(androidManifestFile.getParentFile(),
                                   "AndroidManifest-backup.xml");
        FileUtils.deleteQuietly(backupFile);
        FileUtils.moveFile(androidManifestFile, backupFile);

        XMLWriter writer = null;// 声明写XML的对象
        SAXReader reader = new SAXReader();
        OutputFormat format = OutputFormat.createPrettyPrint();
        format.setEncoding("UTF-8");// 设置XML文件的编码格式
        FileOutputStream fos = new FileOutputStream(androidManifestFile);

        if (androidManifestFile.exists()) {
            try {
                Document document = reader.read(backupFile);// 读取XML文件
                Element root = document.getRootElement();// 得到根节点
                List<? extends Node> nodes = root.selectNodes("//provider");
                for (Node node : nodes) {
                    Element element = (Element) node;
                    String name = element.attributeValue("name");
                    logger.info("[Remove Provider]" + name);
                    element.getParent().remove(element);
                }
                writer = new XMLWriter(fos, format);
                writer.write(document);
            } finally {
                if (null != writer) {
                    writer.close();
                }
                IOUtils.closeQuietly(fos);
            }
        }
    }

    private static void removeProvider(Document document) throws IOException, DocumentException {

        Element root = document.getRootElement();// 得到根节点
        List<? extends Node> nodes = root.selectNodes("//provider");
        for (Node node : nodes) {
            Element element = (Element) node;
            String name = element.attributeValue("name");
            logger.info("[Remove Provider]" + name);
            element.getParent().remove(element);
        }
    }
}
